Re: [exim] Preventing Sender Forgery .

--On 22 August 2008 13:18:58 -0400 JDavila@??? wrote:

> Hi all ,
>
> How can I prevent Sender Forgery for my server. Alot of people in my
> company are getting e-mails from themselves. Any Ideas will be greatly
> appreciated.

When we see email with the MAIL FROM argument in our domain, we reject the
email unless it contains a header that our servers have added. It isn't
anything fancy, but we could put some kind of digital signature in there -
eg with DKIM.

I filter my mail so that internal email is in a separate INBOX, and it's
virtually spam free. There's no good reason why that should be so, the
From: header domain doesn't have to match that in the envelope, but that's
my experience.

>
> Best Regards,
>
> Jeremy



--
Ian Eiloart
IT Services, University of Sussex
x3148